Abstract

We present a useful framework based on the coupled-wave theory, through which we can survey the resonant modes of TM polarization in 2D photonic-crystal lasers and understand their properties in detail. Through numerical calculations, we clarify their threshold gains, deviations from the Bragg frequency and field distributions. We find that the lasing mode can be selected by manipulating the hole-filling factor or the boundary reflection.

(a) Plot of αL vs δL of the two modes A and O for several magnitudes of the coupling constants under the same ratio of κ2L/κ3L=2. (b) The intensity distribution of the four waves, |Rx|2+|Sx|2+|Ry|2+|Sy|2, for mode A, along the x axis at the center of the cavity.